Micrometer-indicator.



hi, k

A. HANSON.

MICROMETERINDICATOR.

APPLICATION man MAY 4. I914.

Patented Nov. 30, 1915.

Z SHEETS-SHEET 1.

i in "mi" l HANSON. IVIICROMETER INDICATOR. APPLICATION FILED MAY 4. I9I4.

1,162,289. I Patented Nov. 30, 1915.

2 $HEETSSHEET 2- I I I I TED STATE PATENT QFFICE AUGUST HANSON; 0F rnovinnuon; RH DEISLAND.

aicao mmmcmoa Specification of Letters fatent.

Patented Nov. 1915.

Application fi'letl Ma 4', 1914. sfia iv'b; saws,

To all whom it may e m:

Be it konwn that I, V citizen of the United States, residing at Providence, in the county of Providence,

State of Rhode Island, have invented certain new and useful Improvements in crometer-Iiidicators; I do hereby declare thefollowing to be a full, clear, and exact description of. the inventien, such. as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to gages such as are used by machinists and others and has tecting minute differences in dimensions.

One object of the invention is to provide an improvedgage of this classwhich will indicate, by simple andim ro" ved devices,

very minute differences in dimensions.

A second object of the invention is to provide an mprbved stand for, such a gage.

,-' r. I: "r U A third object of the invent on 1s to pro vide an attachment for such a gage which can be used for measuring internal dinien 'sioliis. 5

With the ab'oveand other objects in vieW a: l J the invention cons sts in general of certa n novel details of construction and 'combinav ,tion of parts hereinafter fullyv described,

illustrated in the accompanying drawings, and specifically claimed.

In the accompanying drawings, likecharacters of reference ind cate like parts in the several views, and Figure 1 is a side elevation of the complete device showing the same without the internal attachment. Fig. 2 is an end elevation thereof. Fig. 3 is a section on the l ine.33 of Fig. 1. I Fig. 4 is a section on the line 4L-t of Fig. 2. Fig. 5 is a section on the line 55 of Fig. 6 showing the internal attachment applied to the gage. Fig. 6 is a view of the gage with the face plate removed so as to show the working parts thereof. Fig. 7 is a detail view of the device used to hold the gage in an ordinary lathe tool post. Fig. 8 is a section on the line 8-8 of Fig. 7

In carrying out the objects of the invention there is provided base of the character indicated at 10 and in this base is a T-slot 11 adapted to receive the T-head 12 of a clamping bolt 13. This bolt extends into a gage member 14 and on the bolt is a nut 15 which serves to clamp the gage member in adjusted position relative to the base 10. On the base. 10 are a pair of lugs 16 and AUGUST HANSON, a

between these lugs 16 extends the 1 011.17 whereon is slidably and rotatablymouii'ted a clamp, indicated in general-at 18, which serves to connect said rod 17 with a second rod 18 and which will be hereinafter more specifically described. On this seeond rod 18" slidably and rotatably mounted a clamp B which serves to connect the second rod with a third rod 19, the clamp being lieiteinaftei more specifically described. On the end of the third rod 19 is a certain clamp C of the general nature of the clamp A and B and which serves to connect to the third rod the stem 2Q of the indicator..

"Mountedon the stem 20 of the indicator is a disk 21 whereto is secured a box'22 having a dial 23 mounted thereon. Journaled centrally in; this box 22 is a shaft 24; v whereon is carried an indicator hand 25 arthe shaft 24-. Now it will beiobvio us that any movement of the rod or bar 26 will cause rotation of the hand 25' and consequently foree the same to traverse the dial 23.

In practice is. supposed to so proportion the rack, itspinion, and the remaining gears that wheria predetermined movement of the bar 26 takes place, such as one thousandth of an inch, the hand will traverse one division on the dial. Thus by proper ad justinent of the swiveling :clamp 12 the end of the rod 26' may be dropped into contact with any. desired object and any variation from true size be readily detected.

In order to return the rack 26 to its original position there is provided a gear 32 which meshes with the gear 31 and which is mounted on a shaft or spindle 33. This shaft or spindle 33 isconnected to one end of a spiral spring 34 while the other end of said spring is connected to the boX or casing 22 so that when the spindle is rotated the spring will be brought under'tension and when the rod 26 is released from outside influence the spring will cause the gear to return said rod to its original position. The spring also takes up lost motion in gear teeth.

On the base is mounted aspecial table or platform 38 wherewith the bar 26 006perates the measurement of thicknesses.

The attachment comprises a clamp member 39 adapted to engage the bar socket 40 which is fixed to the box'22 and pivoted to this clamp member is a lever 41 which has a rearwardly extending arm 42 connected to a rotatable disk 43 by means of a link 44.-

This disk is notched as at 4:5 and in the notched portion is held one edge of a collar- 46 which is secured on the bar 26 by means of a set screw 47. Thus it will be seen that as the lever 41 is moved the disk will cause backward movement of the bar 26. In order to limit the movement of the disk and prevent injury to the apparatus the disk using the apparatus with the ordinary tool post. This device consists of a straight bar 58 carrying a' clamp indicated in general at I D. Each of these clamps C and Dconsists of a sleeve 54 wherein is mounted a sliding member 55, the sleeve and sliding member being-provided with suitable openings for the reception of the rod which it is desired to clamp. This sleeve is received in a suit- 'able socket 56 in the end of the bar to which it is desired to secure the rod and the member'55 is providedwith a stem 57 having a threaded end for the reception of the clamp nut 58. In the clamp 13 there is employed an outer sleeve 59, an inner sleeve60, anda central member 61 carried slidably bya bushing- 61'. The central member 61 and bushing.

61' are provided with suitable openings for the reception of the rod 19 while the two sleeves are provided with openings for the reception of the rod 18'. On the inner sleeve is screwed a nut 62 so that when the nut is screwed down the outer sleeve is forced against the rod 18 and the latter against -member 63 and sleeve 64 through which passes the rod 17. There is also provided a stem 65 and this stem passes through an opening in a member secured to the lower end of therod 18 so that when the nut 58 is screwed on the stem said rods are secured tightlytogether in any desiredposition.

-The device is used in the} ordinary man-'1 ner for using micrometers and is capable of universal application, the attachment being used when it is desired vtooperate the. device in connectionwith hollow bodies.

There has thus been provided a simple and etlicient device of thekind described and of the character specified.

It will be obvious that many minor changes may be made in the form and con struction of this invention without departing from the material principles thereof. It I is not therefore desired to confine the invention to the exact form herein shown and described. but it is wished to include all such as come properly within the scope claimed.

' lilavingthus described the inventiomwhat is claimed as new, is

An attachment for micrometers having a reciprocable bar, comprisinga clamp adapted to be secured to the micrometer, a lever pivoted to saidclamp, a disk rotatably mounted on the clamp said disk. being pro- V vided with oppositely disposed notches in its edge. a collar adjustably mounted on the bar and engaged in one of said notches, a stud on the clamp engaged in the other notch, and a link connecting the lever and disk. I

Intestimonywhereof, I attix my signature, in the presence of two witnesses.

AUGUST HANSON. Witnesses:

PETER N. FROBERG, CHARLES MANDELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

WashingtonQDGl 

